Philip buys a pack of markers for $1.29, a pencil for $0.84, and an eraser for $0.79. How much does he spend altogether
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On the added picture you can see that graphs of functions 
and 
have two points of intersection. The x-coordinates of these points are the solutions of the equation
.
Hence, the approximate solutions are x=-1.9 and x=1.6.
Hence, the approximate solutions are x=-1.9 and x=1.6.